package com.example.demo.mapper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.example.demo.entity.ExInfo;
import com.example.demo.entity.ExLetters;
import org.apache.ibatis.annotations.Select;

/**
* @author admin
* @description 针对表【ex_letters】的数据库操作Mapper
* @createDate 2024-02-19 15:55:39
* @Entity generator.com.example.demo.ExLetters
*/
public interface ExLettersMapper extends BaseMapper<ExLetters> {
    @Select("select * from ex_letters where id = #{letterId}")
    ExLetters selectByLetterId(Integer letterId);

}




